[New Solver] Cannot refine a property on a table with assert after testing typeof(x) == "table"

Works however if refined using an if condition

```luau
--!strict

local x = {} :: unknown

if typeof(x) == "table" then
	-- Works:
	-- if typeof(x.transform) == "function" then
	-- 	local y = x.transform -- y correctly inferred as "function"
	-- end

	assert(typeof(x.transform) == "function") -- Type Error: (11,16) Type 'table' does not have key 'transform'
end
```